Rotary bias cutter



ott 16, 1928. 31,687,598

c. w. STEELE RO/THARY BIAS CUTTER Filed, may: 5'; 27 v 2 She etS-Sheet 1 attozunp 16,1928. 1 687598 C. W. STEELE ROTARY BIAS CUTTER Filed Nov. 3, 1927 2 Shuts-Sheet 2 o I o O O O: O O o 51 o 30 O O O O O LL LLI Patented Oct. 1c, 1928.

* 4 UNITED T T S P ATENT" F ICE T onannns w. srEELn, or AKRON, onmnssicnon'ro'rrin MILLER or AKRON, OHIO, A oonrona'rron or orrro.

ROTARY BIAS Curran.

Application filed November 3, 1927. Serial No. 230,789.

, My present invention relates to bias cutting machines of the type in'which a continuous traveling web is passed around a platen cyl inder and severed along diagonal lines by an endless series of spaced cutters traveling lengthwise of the cylinder. The invention is designed specifically as an'iinprovement upon the apparatus which forms the subject of Letters Patent of the United States #1,685,531, granted on the 12th day of July, 1927, to TheMiller Rubber Co. as assignee of James XV. Brundage. Such machines are largely used in the cutting of rubberized fab rie for the manufacture of pneumatic tire casings.

For some purposes it is desirable to sever the web at an angle different from that for other purposes; for example, part of the time it is desired to produce strips cutat an angle of and at others at an angle oi 35, and

this invention aims to so improve the machine disclosed in the aforesaid patent that it will be capable of being used to cut strips of either angle desired.

With this and other objects in view the in vention includes the novel construction hereinafter described and particularly defined by the appended claims.

An embodiment of the invention is illus trated in the accompanying drawings, in

- which F 1 is a transverse vertical section on the axial line of the platen shaft, showing the right-h and end thereof and adjacent portion of the platen cylinder in elevation.

F 2 is a plan view of the same.

Fig. 3 is a vertical section on .the axial line of shaft 27 of Fig. 1 showing said shaft in elevation and showing also one of the cutters cooperating with the platen cylinder, the cutter guide being shown in section and broken awa I o AZ the invention concerns only the cutter mechanism and platen driving means, I have, to simplify matters, refrained from illustrating the entire machine, which, it will be understood, except as to matters herein described, is constructed and operated as clearly disclosed in theaforesaid patent.

Referring by reference characters to these drawings, 7 dGSlgIlELtBS the platen cylinder I and 7 the supporting and driving shaft therefor which latter has loose thereon a worm wheel24meshingwith a worm 22 on the cutter and platen drive shaft 19, these beries adjacent its outer end slower means preferablytakes the form of a double ingthesame reference characters as used "in the aforesaid patent, as is also the numeral 410 which designates the cutter carrying chain carrying the cutters ll and mounted and operated as in said. patent. Shaft 7 is extended over what is shown in said. patent and car- (or properly spaced from worm wheel 24) a second worm wheel 25 which is also loose on the platen shaft and meshes with a worm 26 fast on a eountershaft 27, said countershaft 27 being driven from shaft 19 by means such as intermeshing spurgears 28 and 29 of such relative size that shaft 26 is driven at a. faster speed than shaft 19.

Means is provided for selectively clutching R BBER, cor-trance, Q

the worm wheels 24: and 25 whereby the platen cylinder may be driven at a faster or speed relative to shaft 19, and such clutch member 29 splined to shaft 7 and having toothed clutch portions 2 a and 29 designed respectively to engage correspondingly toothed clutch portions 24 and 25 1011 the hubs of worm gears 24 and 25 respectively. Clutch member 29 is operated by a shifter fork 30 having a suitable operatinghandle and preferably provided with means by which it may be locked in position to engage one or the other of the worm wheel clutch members, or in neutral position, which means may take the form of a pin member 31 designed to pass through a hole in .the'shift lever 30 and any one of three holes 32 in the bracket bar 32. Such pin 81 may be locked in place by padlock 83 engaging a staple 34 passing through a corresponding elongated recess "in a hasp like extension of the pin member.

The endless chain of cutters being driven at a constant rate of speed from the shaft 19' the angle of cut will be determined by the speed of rotation of the platen. If, therefore,

a bias cut of 45 is desired worm wheel 24 is clutched to the shaft and worm wheel 25 allowed to run free, while if a bias cut of 35 is desired worm wheel 25 is clutchedto theplaten shaft. In addition to the selective clutch- .ing above described,it is necessary whendise cutters areused to change the angle of the cutters to correspond which may be done by removing the chain having cutters set atthe one angle and substituting a chain having the cutters set at the other angle.-

What I claim is: 1. In a machine of the class described, a

ly of the platen roll, means for driving said chain at auniforin rate of speed, and means for selectively driving said roll at difiere'nt rates of speed; i

2. In a machine platen roll having a roll shaft, an endless chain of spaced apart cutters arranged to travel lengthwise of the roll, a drive shaft operatively connected with said endless chain of cutters, a Worm Wheel loose on said shaft, a Worm on the drive shaftengaging said Worm Wheel, a second Worm Wheel on said shaft, a countershaft driven from said drive shaft at "a diiierent rate of speed, a Worm onsaidcoun- V ,tershai't engaging said second Worm Wheel, of the class described, a

and means v for selectively clutching said Worm Wheels'to the platen roll shaft. In testimony whereof, I affix my signature.

CHARLES W. STEELE I 

